Cita APA (7th ed.)

Gray, A. (1967). Development of economic doctrine: Introductory survey. Longman.

Cita Chicago (17th ed.)

Gray, Alexander. Development of Economic Doctrine: Introductory Survey. London: Longman, 1967.

Cita MLA (9th ed.)

Gray, Alexander. Development of Economic Doctrine: Introductory Survey. Longman, 1967.