APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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