Writers, Various
John Wright and Sons, Ltd., 1915
Buku Referensi
Anne Nuraini, author
Universitas Padjadjaran. Fakultas Pertanian, 2016
Artikel Jurnal
Isty Alfiany, author
Universitas Indonesia, 2016
UI - Skripsi (Membership)
Artikel Jurnal
Belk, Collen
Pearson - Benjamin Cummings, 2008
Buku Teks