APA (7th ed.) Citation

Heyel, C. (1969). Computers, office machines etc. Macmillan.

Chicago Style (17th ed.) Citation

Heyel, Carl. Computers, Office Machines Etc. London: Macmillan, 1969.

MLA (9th ed.) Citation

Heyel, Carl. Computers, Office Machines Etc. Macmillan, 1969.

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