APA Style
Hudson, Russ, Riso, Don Richard. (2000).
Understanding the Enneagram: The Practical Guide to Personality Types .
:
Mariner Books.
Chicago Style
Hudson, Russ, Riso, Don Richard.
Understanding the Enneagram: The Practical Guide to Personality Types.
:
Mariner Books,
2000.
Text.
MLA Style
Hudson, Russ, Riso, Don Richard.
Understanding the Enneagram: The Practical Guide to Personality Types.
:
Mariner Books,
2000.
Text.
Turabian Style
Hudson, Russ, Riso, Don Richard.
Understanding the Enneagram: The Practical Guide to Personality Types.
:
Mariner Books,
2000.
Print.