Παραπομπή APA

Strathern, P. (1997). Pythagoras and his theorem. Arrow books.

Παραπομπή Chicago Style

Strathern, Paul. Pythagoras and His Theorem. London: Arrow books, 1997.

Παραπομπή MLA

Strathern, Paul. Pythagoras and His Theorem. Arrow books, 1997.