Crain, W. C. (1985). Theories of development: Concepts and applications (2a. ed.). Prentice Hall International.
Citace podle Chicago (17th ed.)Crain, William C. Theories of Development: Concepts and Applications. 2a. ed. Londres: Prentice Hall International, 1985.
Citace podle MLA (9th ed.)Crain, William C. Theories of Development: Concepts and Applications. 2a. ed. Prentice Hall International, 1985.
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