Petschek, P. (2008). Grading for landscape architects and architects. Birkhauser.
Citazione stile Chigago Style (17a edizione)Petschek, Peter. Grading for Landscape Architects and Architects. Basel: Birkhauser, 2008.
Citatione MLA (9a ed.)Petschek, Peter. Grading for Landscape Architects and Architects. Birkhauser, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.