Cita APA

Catalan, G. I., & Nabayra, E. S. (1981). Earthworms: A new source of protein (2nd ed.). Philippine Earthworm Center.

Citación estilo Chicago

Catalan, Gabriel Isada, and Emmanuel S. Nabayra. Earthworms: A New Source of Protein. 2nd ed. San Juan, Metro Manila: Philippine Earthworm Center, 1981.

Cita MLA

Catalan, Gabriel Isada, and Emmanuel S. Nabayra. Earthworms: A New Source of Protein. 2nd ed. Philippine Earthworm Center, 1981.