Παραπομπή APA

Dudden, A. P. United States of America: A syllabus of American studies. Univ of Pennsylvania.

Παραπομπή Chicago Style

Dudden, Arthur P. United States of America: A Syllabus of American Studies. Philadelphia: Univ of Pennsylvania.

Παραπομπή MLA

Dudden, Arthur P. United States of America: A Syllabus of American Studies. Univ of Pennsylvania.