APA استشهاد

Steel D, R. G. (1960). Principles and procedures of statistics. mcgraw-hill.

استشهاد بنمط شيكاغو

Steel D, Robert G. Principles and Procedures of Statistics. Newyork: mcgraw-hill, 1960.

MLA استشهاد

Steel D, Robert G. Principles and Procedures of Statistics. mcgraw-hill, 1960.