APA (7th ed.) Citation

Engel, C., Hackel, L. A., & Papaleo, J. (1990). Delphinium blossoms: An anthology. Delphinium Books.

Chicago Style (17th ed.) Citation

Engel, Cecile, Lori Anne Hackel, and Joseph Papaleo. Delphinium Blossoms: An Anthology. Harrison, N.Y.: Delphinium Books, 1990.

MLA (9th ed.) Citation

Engel, Cecile, et al. Delphinium Blossoms: An Anthology. Delphinium Books, 1990.