APA引文

Orr, W. N., & Orr, E. L. (1981). Handbook of Oregon plant and animal fossils. W.N. Orr.

Chicago Style (17th ed.) Citation

Orr, William N., and Elizabeth L. Orr. Handbook of Oregon Plant and Animal Fossils. Eugene, Or.: W.N. Orr, 1981.

MLA引文

Orr, William N., and Elizabeth L. Orr. Handbook of Oregon Plant and Animal Fossils. W.N. Orr, 1981.

警告：這些引文格式不一定是100％准確.