APA

Ober R. L., Bentley E. L. & Miller E. (1971). Systematic observation of teaching: interaction analysis-instructional strategy approach. Englewood Cliffs, N.J: Prentice-Hall.

Chicago

Ober Richard L, Bentley Ernest L and Miller Edith. 1971. Systematic observation of teaching: interaction analysis-instructional strategy approach. Englewood Cliffs, N.J: Prentice-Hall.

Harvard

Ober R. L., Bentley E. L. and Miller E. (1971). Systematic observation of teaching: interaction analysis-instructional strategy approach. Englewood Cliffs, N.J: Prentice-Hall.

MLA

Ober Richard L, Bentley Ernest L and Miller Edith. Systematic observation of teaching: interaction analysis-instructional strategy approach. Englewood Cliffs, N.J: Prentice-Hall. 1971.