Dyfyniad APA

Jacks, L. P. (1928). Constructive citizenship. Doubleday, Doran & Company.

Dyfyniad Arddull Chicago

Jacks, L. P. Constructive Citizenship. Garden City, N.Y.: Doubleday, Doran & Company, 1928.

Dyfyniad MLA

Jacks, L. P. Constructive Citizenship. Doubleday, Doran & Company, 1928.

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