APA ציטוט

Freedman, P. (1960). The principles of scientific research (2nd ed.). Pergamon.

Chicago Style (17th ed.) Citation

Freedman, Paul. The Principles of Scientific Research. 2nd ed. Oxford: Pergamon, 1960.

ציטוט MLA

Freedman, Paul. The Principles of Scientific Research. 2nd ed. Pergamon, 1960.