APA-viite

Thorpe, E., & Thorpe, S. (2019). General studies for civil services preliminary examination. Pearson India education services Pvt Ltd.

Chicago-tyylinen lähdeviittaus

Thorpe, Edgar, ja Showick Thorpe. General Studies for Civil Services Preliminary Examination. Noida: Pearson India education services Pvt Ltd, 2019.

MLA-viite

Thorpe, Edgar, ja Showick Thorpe. General Studies for Civil Services Preliminary Examination. Pearson India education services Pvt Ltd, 2019.