Gaya APA
Littauer, F., Littauer, M. (1997).
Personality Puzzle (Teka-teki Kepribadian) .
Jakarta:
Professional Books.
Gaya MLA
Littauer, Florence., Littauer, Marita.
"Personality Puzzle (Teka-teki Kepribadian)".
Jakarta:
Professional Books,
1997.
Text.