APA (7th ed.) Citation

Johnstone, H. W. (1965). What is philosophy. Macmillan.

Chicago Style (17th ed.) Citation

Johnstone, Henry Webb. What Is Philosophy. New York: Macmillan, 1965.

MLA (9th ed.) Citation

Johnstone, Henry Webb. What Is Philosophy. Macmillan, 1965.

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