APA (7th ed.) Citation

Computers for Professionals (Firm). (1985). 1985 geoscience software directory for the IBM PC & compatibles. International Human Resources Development Corporation.

Chicago Style (17th ed.) Citation

Computers for Professionals (Firm). 1985 Geoscience Software Directory for the IBM PC & Compatibles. Boston, Mass.: International Human Resources Development Corporation, 1985.

MLA (8th ed.) Citation

Computers for Professionals (Firm). 1985 Geoscience Software Directory for the IBM PC & Compatibles. International Human Resources Development Corporation, 1985.