A brief guide to the National Portrait Gallery.

MLA

Strong, Roy. A Brief Guide to the National Portrait Gallery. London: Pitkin Pictorials Ltd, 1969.

APA

Strong, R. (1969). A brief guide to the National Portrait Gallery. London: Pitkin Pictorials Ltd.

Chicago

Strong, Roy A Brief Guide to the National Portrait Gallery. London: Pitkin Pictorials Ltd, 1969.