APA-referens (7:e uppl.)

Clifford, J. (1978). Aspects of economic development 1760 to 1960. Longman.

Chicago-referens (17:e uppl.)

Clifford, James. Aspects of Economic Development 1760 to 1960. London: Longman, 1978.

MLA-referens (9:e uppl.)

Clifford, James. Aspects of Economic Development 1760 to 1960. Longman, 1978.