Swope, G. 1., & Frederick, J. G. (1931). The Swope plan, details, criticism, analysis: Plan by Gerald Swope. The Business Course.
Citace podle Chicago (17th ed.)Swope, Gerald 1872, a J George Frederick. The Swope Plan, Details, Criticism, Analysis: Plan by Gerald Swope. New York: The Business Course, 1931.
Citace podle MLA (9th ed.)Swope, Gerald 1872, a J George Frederick. The Swope Plan, Details, Criticism, Analysis: Plan by Gerald Swope. The Business Course, 1931.
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