Παραπομπή APA

Howell, K. E. (2013). An introduction to the philosophy of methodology. Sage.

Παραπομπή Chicago Style

Howell, Kerry E. An Introduction to the Philosophy of Methodology. Los Angeles: Sage, 2013.

Παραπομπή MLA

Howell, Kerry E. An Introduction to the Philosophy of Methodology. Sage, 2013.