APA (7th ed.) Citation

Hartt, W., Hartt, M., & Cross, W. (1998). The complete idiot's guide to grandparenting. Alpha Books.

Chicago Style (17th ed.) Citation

Hartt, Walter, Marilyn Hartt, and Wilbur Cross. The Complete Idiot's Guide to Grandparenting. New York: Alpha Books, 1998.

MLA (9th ed.) Citation

Hartt, Walter, et al. The Complete Idiot's Guide to Grandparenting. Alpha Books, 1998.