Παραπομπή APA

Ritchie, A. D. (1923). Scientific method: An inquiry into the character and validity of natural laws. New York: Harcourt, Brace and Company.

Παραπομπή Chicago Style

Ritchie, A. D. Scientific Method: An Inquiry Into the Character and Validity of Natural Laws. New York: Harcourt, Brace and Company, 1923.

Παραπομπή MLA

Ritchie, A. D. Scientific Method: An Inquiry Into the Character and Validity of Natural Laws. New York: Harcourt, Brace and Company, 1923.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.