Παραπομπή APA

Clarke, H., L. (1956). Fun With Figures. William Heinemann Ltd.

Παραπομπή Chicago Style

Clarke, Harwood, L. Fun With Figures. London: William Heinemann Ltd, 1956.

Παραπομπή MLA

Clarke, Harwood, L. Fun With Figures. William Heinemann Ltd, 1956.