Cita APA (7th ed.)

Crain, W. C. (1980). Theories of development: Concepts and applications. Prentice-Hall.

Cita Chicago (17th ed.)

Crain, William C. Theories of Development: Concepts and Applications. Englewood Cliffs, New Jersey: Prentice-Hall, 1980.

Cita MLA (9th ed.)

Crain, William C. Theories of Development: Concepts and Applications. Prentice-Hall, 1980.