Cita APA (7a ed.)

Heilman, R. E. (1924). Public utilities: A series of six lectures. Public Service Company of Northern Illinois.

Cita Chicago Style (17a ed.)

Heilman, Ralph E. Public Utilities: A Series of Six Lectures. Chicago: Public Service Company of Northern Illinois, 1924.

Cita MLA (9a ed.)

Heilman, Ralph E. Public Utilities: A Series of Six Lectures. Public Service Company of Northern Illinois, 1924.