APA (7th ed.) Citation

Cumbow, R. C. (1987). Once upon a time: The films of Sergio Leone. Scarecrow Pr.

Chicago Style (17th ed.) Citation

Cumbow, Robert C. Once upon a Time: The Films of Sergio Leone. Metuchen, NJ u.a: Scarecrow Pr, 1987.

MLA (9th ed.) Citation

Cumbow, Robert C. Once upon a Time: The Films of Sergio Leone. Scarecrow Pr, 1987.

Warning: These citations may not always be 100% accurate.