Mach K.A. and others & K.A. Mach, W. M. M. (1978). Typewriting, a mastery approach for IBM Selectric® typewriters: Comprehensive course. Science Research Associates.
Цитирование в стиле Чикаго (17-е изд.)Mach K.A. and others и W. M. Mitchell K.A. Mach. Typewriting, a Mastery Approach for IBM Selectric® Typewriters: Comprehensive Course. Chicago: Science Research Associates, 1978.
Цитирование MLA (8-е изд.)Mach K.A. and others и W. M. Mitchell K.A. Mach. Typewriting, a Mastery Approach for IBM Selectric® Typewriters: Comprehensive Course. Science Research Associates, 1978.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.