APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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