Gaya APA
European sources of scientific and technical information. ().
:
Longman.
Gaya Chicago
European sources of scientific and technical information.
.
:
Longman,
.
.
Gaya MLA
European sources of scientific and technical information.
.
:
Longman,
.
.
Gaya Turabian
European sources of scientific and technical information.
:
Longman,
.
.