Ferrell, R. W. (1964). Customer-oriented planning. Taraporevala.
Chicago Style aipamenaFerrell, Robert W. Customer-oriented Planning. Bombay: Taraporevala, 1964.
MLA aipamenaFerrell, Robert W. Customer-oriented Planning. Taraporevala, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.