Thorpe, E. (2018). Pearson Concise General Knowledge Manual 2018. Pearson India.
Chicago-čujuhus (17. p.)Thorpe, Edgar. Pearson Concise General Knowledge Manual 2018. Pearson India, 2018.
MLA-čujuhus (9. p.)Thorpe, Edgar. Pearson Concise General Knowledge Manual 2018. Pearson India, 2018.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.