Dyfyniad APA

Sherman, J. G. (1974). PSI: personalized system of instruction: 41 germinal papers. W. A. Benjamin.

Dyfyniad Arddull Chicago

Sherman, J. Gilmour. PSI: Personalized System of Instruction: 41 Germinal Papers. Menlo Park, Calif.: W. A. Benjamin, 1974.

Dyfyniad MLA

Sherman, J. Gilmour. PSI: Personalized System of Instruction: 41 Germinal Papers. W. A. Benjamin, 1974.

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