APA aipamena

Ahnert, F. O. (1976). Quantitative slope models. Gebr. Borntraeger.

Chicago Style aipamena

Ahnert, Frank O. Quantitative Slope Models. Berlin: Gebr. Borntraeger, 1976.

MLA aipamena

Ahnert, Frank O. Quantitative Slope Models. Gebr. Borntraeger, 1976.