APA (7th ed.) Citation

Showker, K., & Sehlinger, B. (1998). The unofficial guide to cruises. Macmillan.

Chicago Style (17th ed.) Citation

Showker, Kay, and Bob Sehlinger. The Unofficial Guide to Cruises. New York: Macmillan, 1998.

MLA (9th ed.) Citation

Showker, Kay, and Bob Sehlinger. The Unofficial Guide to Cruises. Macmillan, 1998.

Warning: These citations may not always be 100% accurate.