Christophersen, P. (1973). Second-language learning; myth and reality. Penguin Education.
芝加哥风格引文Christophersen, Paul. Second-language Learning; Myth and Reality. Harmondsworth: Penguin Education, 1973.
MLA引文Christophersen, Paul. Second-language Learning; Myth and Reality. Penguin Education, 1973.
警告：这些引文格式不一定是100％准确.