APA

Harley Hahn, .Harley Hahn's Emacs Field Guide. : Springer.

Chicago

Harley Hahn, .Harley Hahn's Emacs Field Guide. : Springer.

Harvard

Harley Hahn, .Harley Hahn's Emacs Field Guide. : Springer.

MLA

Harley Hahn, .: Springer. .