APA aipamena

Watson, J. A. (1979). Roofing systems. Reston.

Chicago Style aipamena

Watson, John A. Roofing Systems. Virginia: Reston, 1979.

MLA aipamena

Watson, John A. Roofing Systems. Reston, 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.