Παραπομπή APA

Thorp, R. W., & Brooks, R. W. (1994). A revision of the New World Trachusa, subgenera Ulanthidium and Trachusomimus (Hymenoptera : Megachilidae) / mit Abb. Lawrence.

Παραπομπή Chicago Style

Thorp, Robbin W., και Robert W. Brooks. A Revision of the New World Trachusa, Subgenera Ulanthidium and Trachusomimus (Hymenoptera : Megachilidae) / Mit Abb. Lawrence, 1994.

Παραπομπή MLA

Thorp, Robbin W., και Robert W. Brooks. A Revision of the New World Trachusa, Subgenera Ulanthidium and Trachusomimus (Hymenoptera : Megachilidae) / Mit Abb. Lawrence, 1994.