APA-čujuhus (7. p.)
Keen, M., & Strand, J. (2006). Indirect taxes on international aviation. International Monetary Fund.
Chicago-čujuhus (17. p.)
Keen, Michael, juo Jon Strand. Indirect Taxes on International Aviation. [Washington, D.C.?]: International Monetary Fund, 2006.
MLA-čujuhus (9. p.)
Keen, Michael, juo Jon Strand. Indirect Taxes on International Aviation. International Monetary Fund, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.