Computers for Professionals (Firm). (1985). 1985 geoscience software directory for the IBM PC & compatibles. International Human Resources Development Corporation.
芝加哥风格引文Computers for Professionals (Firm). 1985 Geoscience Software Directory for the IBM PC & Compatibles. Boston, Mass.: International Human Resources Development Corporation, 1985.
MLA引文Computers for Professionals (Firm). 1985 Geoscience Software Directory for the IBM PC & Compatibles. International Human Resources Development Corporation, 1985.
警告：这些引文格式不一定是100％准确.