Citace podle APA (7th ed.)

Powers, O. M. (1890). The practical speller: Especially designed for use in commercial education. O.M. Powers.

Citace podle Chicago (17th ed.)

Powers, O. M. The Practical Speller: Especially Designed for Use in Commercial Education. Chicago: O.M. Powers, 1890.

Citace podle MLA (8th ed.)

Powers, O. M. The Practical Speller: Especially Designed for Use in Commercial Education. O.M. Powers, 1890.

Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..