Cassidy, J., Sandstrom, S., Zenith, R. Study Guide and Demonstration Problems. Englewood Cliffs, N. J: Prentice Hall, 1989 VI, 255 - 606 с. 0-13-705709-1.
Cassidy, J., Sandstrom, S., Zenith, R. Study Guide and Demonstration Problems. Englewood Cliffs, N. J: Prentice Hall, 1989 VI, 255 - 606 с. 0-13-705709-1.
Cassidy, J., Sandstrom, S., Zenith, R. (1989) Study Guide and Demonstration Problems, Englewood Cliffs, N. J: Prentice Hall VI, 255 - 606 с. 0-13-705709-1.
Cassidy, J., Sandstrom, S., & Zenith, R. (1989). Study Guide and Demonstration Problems. [Ръководство]. Englewood Cliffs, N. J: Prentice Hall, VI, 255 - 606 с.
Cassidy J, Sandstrom S, Zenith R. Study Guide and Demonstration Problems: [Ръководство]. Englewood Cliffs, N. J: Prentice Hall; 1989. p. VI, 255 - 606 с. ISBN: 0-13-705709-1.