ГОСТ:
van der Walt S., Colbert S. C., Varoquaux G. The NumPy Array: A Structure for Efficient Numerical Computation //Computing in Science & Engineering. — 2011. — T.13. —№. 2 —C. 22-30
MLA:
van der Walt, Stéfan, C. Steven Colbert, and Gaël Varoquaux. "The NumPy Array: A Structure for Efficient Numerical Computation" Computing in Science & Engineering 13.2 (2011): 22-30