Care Organizations The New Competition 1985 Strategic Marketing for Educational Institutions Marketing Essentials Marketing Models Principles of Marketing
end of 1990 (англ.) // Bulletin of the Atomic Scientists : журнал. — Educational Foundation for Nuclear Science, Inc., 1992. — Vol. 47, iss. 1. — P. 48
ISBN 0-8223-0959-9 Arnold, C. L. (January 1919), "The Number Zero", The Ohio Educational Monthly, 68 (1): 21—22, Дата обращения: 11 апреля 2010 Arsham, Hossein