Ziegler, E., & Erich Ziegler, H. Z. (1998). Flavourings. Wiley.
Chicago Style aipamenaZiegler, Erich, and Herta Ziegler Erich Ziegler. Flavourings. New York: Wiley, 1998.
MLA aipamenaZiegler, Erich, and Herta Ziegler Erich Ziegler. Flavourings. Wiley, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.