Dyfyniad APA

Eibling, H. H., & Jackson, C. J. (1977). Two centuries of progress: United States history. Laidlaw brothers.

Dyfyniad Arddull Chicago

Eibling, Harold H., and Carlton J. Jackson. Two Centuries of Progress: United States History. Irvine: Laidlaw brothers, 1977.

Dyfyniad MLA

Eibling, Harold H., and Carlton J. Jackson. Two Centuries of Progress: United States History. Laidlaw brothers, 1977.

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