STRUMPF, M. The complete grammar. Goodwill Publishers.
芝加哥风格引文STRUMPF, Michael. The Complete Grammar. Goodwill Publishers.
MLA引文STRUMPF, Michael. The Complete Grammar. Goodwill Publishers.
警告：这些引文格式不一定是100％准确.
APA引文
STRUMPF, M. The complete grammar. Goodwill Publishers.
芝加哥风格引文STRUMPF, Michael. The Complete Grammar. Goodwill Publishers.
MLA引文STRUMPF, Michael. The Complete Grammar. Goodwill Publishers.