Rotor, N. S. (1980). Introduction to Philippine tourism. Integrated Research Center, De La Salle University.
芝加哥风格引文Rotor, Nilda Servando. Introduction to Philippine Tourism. Manila: Integrated Research Center, De La Salle University, 1980.
MLA引文Rotor, Nilda Servando. Introduction to Philippine Tourism. Integrated Research Center, De La Salle University, 1980.
警告：这些引文格式不一定是100％准确.