Gaya APA
Lebedeva, M.
(2002).
Guideline of Ulkus Peptikum
.
USA:
American International Health Aliance.
Gaya MLA
Lebedeva, Marta.
"Guideline of Ulkus Peptikum".
USA:
American International Health Aliance,
2002.
Koleksi Cetak.