APA استشهاد

Geoff, T. (1971). Theory and practice of investment. Heinemann.

استشهاد بنمط شيكاغو

Geoff, T.G. Theory and Practice of Investment. London: Heinemann, 1971.

MLA استشهاد

Geoff, T.G. Theory and Practice of Investment. Heinemann, 1971.