(1959). American english course: Two on the way. Instituto Mexicano Norteamericano de relaciones Culturales.
芝加哥风格引文American English Course: Two on the Way. México, D.F: Instituto Mexicano Norteamericano de relaciones Culturales, 1959.
MLA引文American English Course: Two on the Way. Instituto Mexicano Norteamericano de relaciones Culturales, 1959.
警告：这些引文格式不一定是100％准确.