APA
Bu F., Stemler P. & Cheng A. (2007). Field study of ricinus viking formation. : .
Chicago
Bu F, Stemler P and Cheng A. 2007. Field study of ricinus viking formation. : .
Harvard
Bu F., Stemler P. and Cheng A. (2007). Field study of ricinus viking formation. : .
MLA
Bu F, Stemler P and Cheng A. Field study of ricinus viking formation. : . 2007.
