ROYSTON ANGELA. (2019). MY WORLD OF SCIENCE NATURAL AND MAN MADE (2018 Ed.). HEINEMANN LIBRARY.
Chicago-čujuhus (17. p.)ROYSTON ANGELA. MY WORLD OF SCIENCE NATURAL AND MAN MADE. 2018 Ed. MINNESOTA: HEINEMANN LIBRARY, 2019.
MLA-čujuhus (9. p.)ROYSTON ANGELA. MY WORLD OF SCIENCE NATURAL AND MAN MADE. 2018 Ed. HEINEMANN LIBRARY, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.