APA (7th ed.) Citation

Gregory & Wojtkowski. (1989). Applications software programming with fourth-generation languages. Boyd & Fraser Publishing Company.

Chicago Style (17th ed.) Citation

Gregory and Wojtkowski. Applications Software Programming with Fourth-generation Languages. Boston: Boyd & Fraser Publishing Company, 1989.

MLA (9th ed.) Citation

Gregory and Wojtkowski. Applications Software Programming with Fourth-generation Languages. Boyd & Fraser Publishing Company, 1989.

Warning: These citations may not always be 100% accurate.