Cita APA (7a ed.)

Gray, A. (1931). The development of economic doctrine: An introductory survey. Longmans.

Cita Chicago Style (17a ed.)

Gray, Alexander. The Development of Economic Doctrine: An Introductory Survey. London: Longmans, 1931.

Cita MLA (8a ed.)

Gray, Alexander. The Development of Economic Doctrine: An Introductory Survey. Longmans, 1931.