Cita APA (7th ed.)

Ramos, E. C., & Sichermann, R. J. (1978). Introduction to human development. Textbook Development Committee, De La Salle University.

Cita Chicago (17th ed.)

Ramos, Exaltacion Castillo, i Rosalita Jesswani Sichermann. Introduction to Human Development. Manila: Textbook Development Committee, De La Salle University, 1978.

Cita MLA (9th ed.)

Ramos, Exaltacion Castillo, i Rosalita Jesswani Sichermann. Introduction to Human Development. Textbook Development Committee, De La Salle University, 1978.