Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Riley, D. (1980). Early landscape from the air. Studies of crop marks in South Yorkshire and North Nottinghamshire. [s.n.].

Chicago Citation Edition Citation

Riley, D. Early Landscape from the Air. Studies of Crop Marks in South Yorkshire and North Nottinghamshire. Sheffield: [s.n.], 1980.

MLA Citation Edition Citation

Riley, D. Early Landscape from the Air. Studies of Crop Marks in South Yorkshire and North Nottinghamshire. [s.n.], 1980.