APA (7th ed.) Citation

Crockett, J. U., Allen, O. E., & Crist, R. (1977). Wildflower gardening. Time-Life Books.

Chicago Style (17th ed.) Citation

Crockett, James Underwood, Oliver E. Allen, and Richard Crist. Wildflower Gardening. Alexandria, Va.: Time-Life Books, 1977.

MLA (9th ed.) Citation

Crockett, James Underwood, et al. Wildflower Gardening. Time-Life Books, 1977.