Cita APA (7a ed.)

Ritchie, R. S. (1956). NATO, the economics of an alliance. Ryerson.

Cita Chicago Style (17a ed.)

Ritchie, Ronald S. NATO, the Economics of an Alliance. Toronto: Ryerson, 1956.

Cita MLA (9a ed.)

Ritchie, Ronald S. NATO, the Economics of an Alliance. Ryerson, 1956.