APA
Olausson L., Sangster C. M., . (2006). Oxford BBC guide to pronunciation. Oxford: Oxford University Press.
Chicago
Olausson Lena, Sangster C M, . 2006. Oxford BBC guide to pronunciation. Oxford: Oxford University Press.
Harvard
Olausson L., Sangster C. M., . (2006). Oxford BBC guide to pronunciation. Oxford: Oxford University Press.
MLA
Olausson Lena, Sangster C M, . Oxford BBC guide to pronunciation. Oxford: Oxford University Press. 2006.