Gray, A. (2000). Tubes (2nd ed.). Birkhauser Boston.
Chicago Edition CitationGray, Alfred. Tubes. 2nd ed. Boston: Birkhauser Boston, 2000.
Cita MLAGray, Alfred. Tubes. 2nd ed. Birkhauser Boston, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.