Παραπομπή APA

Hanson, N. R., & Humphreys, W. C. (1969). Perception and discovery: An introduction to scientific inquiry. San Francisco: Freeman, Cooper.

Παραπομπή Chicago Style

Hanson, Norwood Russell, and Willard C. Humphreys. Perception and Discovery: An Introduction to Scientific Inquiry. San Francisco: Freeman, Cooper, 1969.

Παραπομπή MLA

Hanson, Norwood Russell, and Willard C. Humphreys. Perception and Discovery: An Introduction to Scientific Inquiry. San Francisco: Freeman, Cooper, 1969.

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