Educational Services Incorporated. (1967). Introductory physical science. Prentice-Hall.
Chicago-viite (17. p.)Educational Services Incorporated. Introductory Physical Science. Englewood Cliff, NJ: Prentice-Hall, 1967.
MLA-viite (9. p.)Educational Services Incorporated. Introductory Physical Science. Prentice-Hall, 1967.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.