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Permission to use 91HUB Hill material may be obtained by submitting a written request to the 91HUB Hill Permissions Department.

Before submitting a request, please check if the material to be used is credited to another source; if so, permission must be obtained from the credited source rather than from 91HUB Hill. Credits may appear with the material, in a separate acknowledgments section at the beginning or end of the chapter in which the material appears; or in a separate acknowledgments section in the front or the back of the book.

Request Permission to Use 91HUB Hill Material

To request permission to use 91HUB Hill material, please select the appropriate link below:

Status Inquiries

Status inquiries for previously submitted requests may be e-mailed to