Working Group on Extraterrestrial Resources (U.S.). (1969). Proceedings of the Sixth Annual Meeting, [held at] Aerospace Medical Division, Brooks Air Force Base, Tex., February 19-21, 1968. Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1968 [i.e.
芝加哥风格引文Working Group on Extraterrestrial Resources (U.S.). Proceedings of the Sixth Annual Meeting, [held at] Aerospace Medical Division, Brooks Air Force Base, Tex., February 19-21, 1968. Washington: Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1968 [i.e, 1969.
MLA引文Working Group on Extraterrestrial Resources (U.S.). Proceedings of the Sixth Annual Meeting, [held at] Aerospace Medical Division, Brooks Air Force Base, Tex., February 19-21, 1968. Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] 1968 [i.e, 1969.