Leather, S. (2000). Desert, mountain, Sea: Stage 4 (1400 Headwords). Oxford: Oxford Univ. Press.
Chicago Style aipamenaLeather, Sue. Desert, Mountain, Sea: Stage 4 (1400 Headwords). Oxford: Oxford Univ. Press, 2000.
MLA aipamenaLeather, Sue. Desert, Mountain, Sea: Stage 4 (1400 Headwords). Oxford: Oxford Univ. Press, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.