"The Traveling Team" is a missions mobilization organization that, while focused on energizing college students for the great commission, has many great resources for anyone wanting to learn more. This resource provides an overview of the 7 major world religions to help you have a better understanding of those with whom you may interact.
The "Reaching Internationals" site contains links to many culturally-specific resources to help you engage internationals with the Gospel. There are free tracts, Bible study resources, and cultural awareness training resources that will no doubt help you feel equipped as you minister cross-culturally!
Peoples Next Door is a ministry of the NC Baptist Convention purposed to equip churches to engage internationals. This manual introduces you to the process of discovering internationals in your area and how to engage them with the Gospel.
This booklet gives information and outreach ideas for connecting with international students. It gives conversation and activity ideas, tips for how to share your faith with people from different backgrounds, and pointers for developing lasting relationships.
Dr. Andy Davis wrote this twelve-week that goes over the basic tenets of the Christian faith. This is a great discipleship resource to go over with a new believer. Available in English and Chinese/English.
Throughout his teaching ministry at FBC, Dr. Andy Davis has compiled expository study questions that guide the reader to understand the Bible. Click the link above to access a regularly-updated list of Bible study booklets you can use to conduct a study with internationals.