Παραπομπή APA

International Grassland Congress Pennsylvania, & International Grassland Congress. (1952). Proceedings of the sixth international grassland congress. Pennsylvania: Pennsylvania State College.

Παραπομπή Chicago Style

International Grassland Congress Pennsylvania, και International Grassland Congress. Proceedings of the Sixth International Grassland Congress. Pennsylvania: Pennsylvania State College, 1952.

Παραπομπή MLA

International Grassland Congress Pennsylvania, και International Grassland Congress. Proceedings of the Sixth International Grassland Congress. Pennsylvania: Pennsylvania State College, 1952.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.