APA-viite (7. p.)

Hughes, W. (1992). Critical thinking: An introduction to the basic skills. Broadview Press.

Chicago-viite (17. p.)

Hughes, William. Critical Thinking: An Introduction to the Basic Skills. Peterborough, Ontario: Broadview Press, 1992.

MLA-viite (9. p.)

Hughes, William. Critical Thinking: An Introduction to the Basic Skills. Broadview Press, 1992.