Lefrançois, G. R. (1991). Psychology for teaching: A bear always, usually, sometimes, rarely, never, always faces the front--will not commit himself just now (7th ed.). Wadsworth Publ. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLefrançois, Guy R. Psychology for Teaching: A Bear Always, Usually, Sometimes, Rarely, Never, Always Faces the Front--will Not Commit Himself Just Now. 7th ed. Belmont, Calif.: Wadsworth Publ. Co., 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLefrançois, Guy R. Psychology for Teaching: A Bear Always, Usually, Sometimes, Rarely, Never, Always Faces the Front--will Not Commit Himself Just Now. 7th ed. Wadsworth Publ. Co., 1991.
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