Gaya APA
Didona, N., 2016-10-20, .
().
088990115
(
Textbook)
.
600:
2016-10-20.
Gaya MLA
Didona, Nancy., 2016-10-20, .
"088990115".
Textbook
600:
2016-10-20,
.
615.14 RUB p.