W P Crawford. (1991). Proceedings 39th annual pfizer research conference may 13, 1991. Newyork.
Chicago Edition CitationW P Crawford. Proceedings 39th Annual Pfizer Research Conference May 13, 1991. Newyork, 1991.
MLA引文W P Crawford. Proceedings 39th Annual Pfizer Research Conference May 13, 1991. Newyork, 1991.
警告:這些引文格式不一定是100%准確.