APA (7th ed.) Citation

Chen, P. P. S. (1977). The entity-relationship approach to logical data base design. Q.E.D. Information Sciences.

Chicago Style (17th ed.) Citation

Chen, Peter P. S. The Entity-relationship Approach to Logical Data Base Design. Wellesley, Mass.: Q.E.D. Information Sciences, 1977.

MLA (8th ed.) Citation

Chen, Peter P. S. The Entity-relationship Approach to Logical Data Base Design. Q.E.D. Information Sciences, 1977.