Valentine, K., Valentine, E. Interlocking Pieces. Dubuque: Kendall/ Hunt Publishing Company, 1991 134 p. 0-8403-6433-4.
Valentine, K., Valentine, E. Interlocking Pieces. Dubuque: Kendall/ Hunt Publishing Company, 1991 134 p. 0-8403-6433-4.
Valentine, K., Valentine, E. (1991) Interlocking Pieces, Dubuque: Kendall/ Hunt Publishing Company 134 p. 0-8403-6433-4.
Valentine, K., & Valentine, E. (1991). Interlocking Pieces. Twenty Questions for Understanding Literature. Dubuque: Kendall/ Hunt Publishing Company, 134 p.
Valentine K, Valentine E. Interlocking Pieces: Twenty Questions for Understanding Literature. Dubuque: Kendall/ Hunt Publishing Company; 1991. p. 134 p. ISBN: 0-8403-6433-4.