Education Development Center. IPS Group & Haber-Schaim, U. (1972). Introductory physical science (2d edition.). Prentice-Hall.
Citace podle Chicago (17th ed.)Education Development Center. IPS Group a Uri Haber-Schaim. Introductory Physical Science. 2d edition. Englewood Cliffs, N.J: Prentice-Hall, 1972.
Citace podle MLA (9th ed.)Education Development Center. IPS Group a Uri Haber-Schaim. Introductory Physical Science. 2d edition. Prentice-Hall, 1972.
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