Παραπομπή APA

Harlan, J. R. (1956). Theory and dynamics of grassland agriculture. D Van nostrand Company Inc.

Παραπομπή Chicago Style

Harlan, Jack R. Theory and Dynamics of Grassland Agriculture. Newjerssey: D Van nostrand Company Inc, 1956.

Παραπομπή MLA

Harlan, Jack R. Theory and Dynamics of Grassland Agriculture. D Van nostrand Company Inc, 1956.