Gaya APA
Haruna, Ahmad Osumanu. (2014).
Humic substances and urea use in agricultures .
MALAYSIA:
Penerbit Universiti Kebangsaan Malaysia (UKM).
Gaya Chicago
Haruna, Ahmad Osumanu.
Humic substances and urea use in agricultures.
MALAYSIA:
Penerbit Universiti Kebangsaan Malaysia (UKM),
2014.
E-BOOK.
Gaya MLA
Haruna, Ahmad Osumanu.
Humic substances and urea use in agricultures.
MALAYSIA:
Penerbit Universiti Kebangsaan Malaysia (UKM),
2014.
E-BOOK.
Gaya Turabian
Haruna, Ahmad Osumanu.
Humic substances and urea use in agricultures.
MALAYSIA:
Penerbit Universiti Kebangsaan Malaysia (UKM),
2014.
E-BOOK.