Gondin, W. R., & Mammen, E. W. (1967). The art of speaking: Made simple. W H Allen.
Chicago Edition CitationGondin, William R., i Edward W. Mammen. The Art of Speaking: Made Simple. London: W H Allen, 1967.
Cita MLAGondin, William R., i Edward W. Mammen. The Art of Speaking: Made Simple. W H Allen, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.