APA引文

Curtis, J. K., & Birney, M. (2012). Animal helpers. Sylvan Dell Pub..

Chicago Style (17th ed.) Citation

Curtis, Jennifer Keats, and Mary Birney. Animal Helpers. Mt. Pleasant, S.C.: Sylvan Dell Pub., 2012.

MLA引文

Curtis, Jennifer Keats, and Mary Birney. Animal Helpers. Sylvan Dell Pub., 2012.

警告：這些引文格式不一定是100％准確.