APA (7th ed.) Citation

Richie, J. W., Echavarria, J. P., & Layug, M. A. B. (1930). Philippine plant life: A botanical and agricultural reader. Silver, Burdett.

Chicago Style (17th ed.) Citation

Richie, John Woodside, Julia P. Echavarria, and Mrs. Antonina B. Layug. Philippine Plant Life: A Botanical and Agricultural Reader. New York: Silver, Burdett, 1930.

MLA (9th ed.) Citation

Richie, John Woodside, et al. Philippine Plant Life: A Botanical and Agricultural Reader. Silver, Burdett, 1930.