DAY, R. [. (1981). Know How 16. Orbis.
Cita Chicago (17th ed.)DAY, Roy [ed.]. Know How 16. Bedfordbury: Orbis, 1981.
Cita MLA (9th ed.)DAY, Roy [ed.]. Know How 16. Orbis, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)