Cramer, R. L. (1978). Spelling: Words and skills. Scott, Foresman.
芝加哥风格引文Cramer, Ronald L. Spelling: Words and Skills. Scott, Foresman, 1978.
MLA引文Cramer, Ronald L. Spelling: Words and Skills. Scott, Foresman, 1978.
警告：这些引文格式不一定是100％准确.
APA引文