Koberg, D., & Bagnall, J. (1990). The all new universal traveler: A soft-systems guide to creativity, problem-solving, and the process of reaching goals (Rev.). Crisp Publications, Inc.
Citace podle Chicago (17th ed.)Koberg, Don, a Jim Bagnall. The All New Universal Traveler: A Soft-systems Guide to Creativity, Problem-solving, and the Process of Reaching Goals. Rev. Los Alton. Calif: Crisp Publications, Inc, 1990.
Citace podle MLA (9th ed.)Koberg, Don, a Jim Bagnall. The All New Universal Traveler: A Soft-systems Guide to Creativity, Problem-solving, and the Process of Reaching Goals. Rev. Crisp Publications, Inc, 1990.
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