APA (7th ed.) Citation

Hewett, J., & Hewett, R. (1979). Watching them grow: Inside a zoo nursery. Little, Brown.

Chicago Style (17th ed.) Citation

Hewett, Joan, and Richard Hewett. Watching Them Grow: Inside a Zoo Nursery. Boston: Little, Brown, 1979.

MLA (9th ed.) Citation

Hewett, Joan, and Richard Hewett. Watching Them Grow: Inside a Zoo Nursery. Little, Brown, 1979.