Dyfyniad APA

Farrell, H. (1926). What price progress?: The stake of the investor in the discoveries of science. New York: G. P. Putnam's sons.

Dyfyniad Arddull Chicago

Farrell, Hugh. What Price Progress?: The Stake of the Investor in the Discoveries of Science. New York: G. P. Putnam's sons, 1926.

Dyfyniad MLA

Farrell, Hugh. What Price Progress?: The Stake of the Investor in the Discoveries of Science. New York: G. P. Putnam's sons, 1926.

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