Hubbard, L. R. (1990). Small common words defined. Bridge Publications.
Cita Chicago (17th ed.)Hubbard, L. Ron. Small Common Words Defined. Los Angeles, California: Bridge Publications, 1990.
Cita MLA (9th ed.)Hubbard, L. Ron. Small Common Words Defined. Bridge Publications, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.