APA-referens (7:e uppl.)

Gregorio, H. C. (1966). School administration and supervision. R. P. Garcia.

Chicago-referens (17:e uppl.)

Gregorio, Herman C. School Administration and Supervision. Quezon City, Phils: R. P. Garcia, 1966.

MLA-referens (9:e uppl.)

Gregorio, Herman C. School Administration and Supervision. R. P. Garcia, 1966.