APA
Backus W. D., Backus C., . (1990). What did I do wrong? What can I do now?. Minneapolis, Minn: Bethany House Publishers.
Chicago
Backus William D, Backus Candace, . 1990. What did I do wrong? What can I do now?. Minneapolis, Minn: Bethany House Publishers.
Harvard
Backus W. D., Backus C., . (1990). What did I do wrong? What can I do now?. Minneapolis, Minn: Bethany House Publishers.
MLA
Backus William D, Backus Candace, . What did I do wrong? What can I do now?. Minneapolis, Minn: Bethany House Publishers. 1990.