एपीए उद्धरण

Theobald, D. (1968). Introduction to the philosophy of science. Methuen.

शिकागो स्टाइल उद्धरण

Theobald, D.W. Introduction to the Philosophy of Science. London: Methuen, 1968.

एमएलए उद्धरण

Theobald, D.W. Introduction to the Philosophy of Science. Methuen, 1968.