APA (7e ed.) Bronvermelding

Penrose, E. (1968). A Note on Development Planning and The Role of The Enterprise. The Institute of National Planning.

Chicago (17e ed.) Bronvermelding

Penrose, E. A Note on Development Planning and The Role of The Enterprise. Cairo: The Institute of National Planning, 1968.

MLA (9e ed.) Bronvermelding

Penrose, E. A Note on Development Planning and The Role of The Enterprise. The Institute of National Planning, 1968.