Παραπομπή APA

Johnston, P. H. (1925). Knowledge is power: One of a series of lectures in a systematic courses. Chicago: La Salle Extension University.

Παραπομπή Chicago Style

Johnston, Percy H. Knowledge Is Power: One of a Series of Lectures in a Systematic Courses. Chicago: La Salle Extension University, 1925.

Παραπομπή MLA

Johnston, Percy H. Knowledge Is Power: One of a Series of Lectures in a Systematic Courses. Chicago: La Salle Extension University, 1925.

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