APA (7th ed.) Citation

Gill, H. V. (1991). Competency in effective questioning. [publisher not identified].

Chicago Style (17th ed.) Citation

Gill, Helen V. Competency in Effective Questioning. [Corpus Chrisiti, Tex.]: [publisher not identified], 1991.

MLA (9th ed.) Citation

Gill, Helen V. Competency in Effective Questioning. [publisher not identified], 1991.