Lua APA (7ú heag.)

SPEARS, H. (1951). Principles of teaching. Prentice-Hall.

Lua i Stíl Chicago (17ú heag.)

SPEARS, Harold. Principles of Teaching. New York: Prentice-Hall, 1951.

Lua MLA (9ú heag.)

SPEARS, Harold. Principles of Teaching. Prentice-Hall, 1951.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.