Library of Congress. Congressional Research Service & ProQuest (Firm). (1991). L-Tryptophan: Health Problems, Production and Regulatory Status : Proceedings of a CRS Seminar. [publisher not identified].
Chicago Style (17th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). L-Tryptophan: Health Problems, Production and Regulatory Status : Proceedings of a CRS Seminar. [Place of publication not identified]: [publisher not identified], 1991.
MLA (9th ed.) CitationLibrary of Congress. Congressional Research Service and ProQuest (Firm). L-Tryptophan: Health Problems, Production and Regulatory Status : Proceedings of a CRS Seminar. [publisher not identified], 1991.
Warning: These citations may not always be 100% accurate.