Hillis, D. W. (1974). Is the whole body a tongue? Baker Book House.
Cita Chicago (17th ed.)Hillis, Don W. Is the Whole Body a Tongue? Baker Book House, 1974.
Cita MLA (9th ed.)Hillis, Don W. Is the Whole Body a Tongue? Baker Book House, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.