Gaddie, R. E. (1977). Earthworms for ecology & profit. Ontario, Calif: Bookworm Pub. Co.
Trích dẫn kiểu ChicagoGaddie, Ronald E. Earthworms for Ecology & Profit. Ontario, Calif: Bookworm Pub. Co, 1977.
MLA引文Gaddie, Ronald E. Earthworms for Ecology & Profit. Ontario, Calif: Bookworm Pub. Co, 1977.
警告:這些引文格式不一定是100%准確.