APA (7th ed.) Citation

Macaulay, R., & Babington Smith, C. (1964). Letters to a sister. Collins.

Chicago Style (17th ed.) Citation

Macaulay, Rose, and Constance Babington Smith. Letters to a Sister. London: Collins, 1964.

MLA (9th ed.) Citation

Macaulay, Rose, and Constance Babington Smith. Letters to a Sister. Collins, 1964.