APA引文

Gilbert H Ahlgren. (1956). Forage crops (2.). Mc Graw Hill Book company Inc.

Chicago Edition Citation

Gilbert H Ahlgren. Forage Crops. 2. Mc Graw Hill Book company Inc, 1956.

MLA引文

Gilbert H Ahlgren. Forage Crops. 2. Mc Graw Hill Book company Inc, 1956.

警告：這些引文格式不一定是100％准確.