Cita APA (7th ed.)

Crain, W. C. (1985). Theories of development: Concepts and applications (2a. ed.). Prentice Hall International.

Cita Chicago (17th ed.)

Crain, William C. Theories of Development: Concepts and Applications. 2a. ed. Londres: Prentice Hall International, 1985.

Cita MLA (9th ed.)

Crain, William C. Theories of Development: Concepts and Applications. 2a. ed. Prentice Hall International, 1985.