APA aipamena

CROCKETT, J. U. Perennials: The time-life encyclopedia of gardening. Time-life Books Alexandria.

Chicago Style aipamena

CROCKETT, James Underwood. Perennials: The Time-life Encyclopedia of Gardening. Time-life Books Alexandria.

MLA aipamena

CROCKETT, James Underwood. Perennials: The Time-life Encyclopedia of Gardening. Time-life Books Alexandria.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.