APA (7th ed.) Citation

Holtby, W., Holtby, A., & McWilliam, J. (1937). Letters to a friend / edited by Alice Holtby and Jean McWilliam. Collins.

Chicago Style (17th ed.) Citation

Holtby, Winifred, Alice Holtby, and Jean McWilliam. Letters to a Friend / Edited by Alice Holtby and Jean McWilliam. London: Collins, 1937.

MLA (9th ed.) Citation

Holtby, Winifred, et al. Letters to a Friend / Edited by Alice Holtby and Jean McWilliam. Collins, 1937.

Warning: These citations may not always be 100% accurate.