APA citiranje

Roberts, J. M. (1980). The Pelican history of the world. Harmondsworth: Penguin Books.

Trích dẫn kiểu Chicago

Roberts, J. M. The Pelican History of the World. Harmondsworth: Penguin Books, 1980.

MLA citiranje

Roberts, J. M. The Pelican History of the World. Harmondsworth: Penguin Books, 1980.

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