APA (7th ed.) Zitazioa

Petschek, P. (2008). Grading for landscape architects and architects. Birkhauser.

Chicago Style (17th ed.) Zitazioa

Petschek, Peter. Grading for Landscape Architects and Architects. Basel: Birkhauser, 2008.

MLA (9th ed.) Zitazioa

Petschek, Peter. Grading for Landscape Architects and Architects. Birkhauser, 2008.