APA (7e ed.) Bronvermelding

Crain, W. (2005). Theories of development: Concepts and applications (5th edition.). Pearson/Prentice Hall.

Chicago (17e ed.) Bronvermelding

Crain, William. Theories of Development: Concepts and Applications. 5th edition. Upper Saddle River, New Jersey: Pearson/Prentice Hall, 2005.

MLA (9e ed.) Bronvermelding

Crain, William. Theories of Development: Concepts and Applications. 5th edition. Pearson/Prentice Hall, 2005.