APA (7th ed.) Zitazioa

Estall, R. C. (1961). Industrial activity and economic geography. Hutchinson.

Chicago Style (17th ed.) Zitazioa

Estall, R. C. Industrial Activity and Economic Geography. London: Hutchinson, 1961.

MLA (9th ed.) Zitazioa

Estall, R. C. Industrial Activity and Economic Geography. Hutchinson, 1961.