Cita APA (7th ed.)

HUBBARD RON L. (2001). SOLUTIONS FOR DANGEROUS ENVIRONMENT. NEW ERA PUB. CO. LTD.

Cita Chicago (17th ed.)

HUBBARD RON L. SOLUTIONS FOR DANGEROUS ENVIRONMENT. SMEDLAND: NEW ERA PUB. CO. LTD, 2001.

Cita MLA (9th ed.)

HUBBARD RON L. SOLUTIONS FOR DANGEROUS ENVIRONMENT. NEW ERA PUB. CO. LTD, 2001.