Cita APA (7a ed.)
(1981). Pool & spa marketing. [Hubbard Marketing & Pub.].
Cita Chicago Style (17a ed.)
Pool & Spa Marketing. [Toronto]: [Hubbard Marketing & Pub.], 1981.
Cita MLA (9a ed.)
Pool & Spa Marketing. [Hubbard Marketing & Pub.], 1981.
Precaución: Estas citas no son 100% exactas.