Leonard, W. H., & Penick, J. E. (1998). Biology: A community context. South-Western Educational Pub.
芝加哥风格引文Leonard, William H., 与 John E. Penick. Biology: A Community Context. Cincinnati, Ohio: South-Western Educational Pub, 1998.
MLA引文Leonard, William H., 与 John E. Penick. Biology: A Community Context. South-Western Educational Pub, 1998.
警告：这些引文格式不一定是100％准确.