Westphal, B. (1968). John the intrepid. Review and Herald.
Chicago-čujuhus (17. p.)Westphal, Barbara. John the Intrepid. Review and Herald, 1968.
MLA-čujuhus (9. p.)Westphal, Barbara. John the Intrepid. Review and Herald, 1968.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.