Frey, D. (1999). Autocad 2000: No experience required. San Francisco: Sybex.
Trích dẫn kiểu ChicagoFrey, David. Autocad 2000: No Experience Required. San Francisco: Sybex, 1999.
MLA引文Frey, David. Autocad 2000: No Experience Required. San Francisco: Sybex, 1999.
警告:这些引文格式不一定是100%准确.