HUDMAN LLOYD. (2003). GEOGRAPHY OF TRAVEL & TOURISM (4TH.). DELMAR CENGAGE LEARNING.
芝加哥风格引文HUDMAN LLOYD. GEOGRAPHY OF TRAVEL & TOURISM. 4TH. USA: DELMAR CENGAGE LEARNING, 2003.
MLA引文HUDMAN LLOYD. GEOGRAPHY OF TRAVEL & TOURISM. 4TH. DELMAR CENGAGE LEARNING, 2003.
警告：这些引文格式不一定是100％准确.