Gaya APA

Hubbard, L, R. (USA : New Era public). Horticuture for a greener world: the L. Ron Hubbard Series . Amerika: USA : New Era publication International ApS, 2012.

Gaya MLA

Hubbard, L., Ron. "Horticuture for a greener world: the L. Ron Hubbard Series". Amerika: USA : New Era publication International ApS, 2012, USA : New Era public. Text.