Cita APA (7th ed.)

Clough, S. D., & Hubbard, E. (1911). Backbone: Hints for the prevention of jelly spine curvature and mental squint, a straight-up antidote for the blues and a straight-ahead sure cure for grouch (5th ed.). Angus & Robertson.

Cita Chicago (17th ed.)

Clough, S. DeWitt, i Elbert Hubbard. Backbone: Hints for the Prevention of Jelly Spine Curvature and Mental Squint, a Straight-up Antidote for the Blues and a Straight-ahead Sure Cure for Grouch. 5th ed. Sydney: Angus & Robertson, 1911.

Cita MLA (8th ed.)

Clough, S. DeWitt, i Elbert Hubbard. Backbone: Hints for the Prevention of Jelly Spine Curvature and Mental Squint, a Straight-up Antidote for the Blues and a Straight-ahead Sure Cure for Grouch. 5th ed. Angus & Robertson, 1911.