Gaddie, R. E. (1977). Earthworms for ecology & profit. Ontario, Calif: Bookworm Publishing.
シカゴスタイル引用形Gaddie, Ronald E. Earthworms for Ecology & Profit. Ontario, Calif: Bookworm Publishing, 1977.
MLA引用形式Gaddie, Ronald E. Earthworms for Ecology & Profit. Ontario, Calif: Bookworm Publishing, 1977.
警告: この引用は必ずしも正確ではありません.