GRUBER GARY R. (1980). GRADUATE MANAGEMENT ADMISSION TEST (GMAT). MONARCH PRESS.
芝加哥风格引文GRUBER GARY R. GRADUATE MANAGEMENT ADMISSION TEST (GMAT). NEW YORK: MONARCH PRESS, 1980.
MLA引文GRUBER GARY R. GRADUATE MANAGEMENT ADMISSION TEST (GMAT). MONARCH PRESS, 1980.
警告：这些引文格式不一定是100％准确.