^The East 1970 Page 293 "Follow the instructions on the next page. Crease the paper tightly, and you will obtain clear-cut J forms. The first in our series is the orizuru (folded crane), which is the most classic of all Japanese origami. The process of folding is not so simple."
^Patsy Wang-Iverson, Robert J. Lang, Mark Yim Origami 5: Fifth International Meeting of Origami Science 2011 Page 8 "The older pieces are ceremonial wrappers, including ocho and mecho, and the newer ones are the traditional models we know well, such as the orizuru (crane) and yakko-san (servant) [Takagi 99]."
^Mathematical reviews American Mathematical Society, Mathematical Association of America 2004 Page 349 "The author describes how to fold the orizuru and the generalized orizuru from paper other than a square. Many figures explain the procedure."