APA Style
Britannica Student Encyclopedia 6 : H I. (2010).
London:
Britannica.
Chicago Style
Britannica Student Encyclopedia 6 : H I.
.
London:
Britannica,
2010.
.
MLA Style
Britannica Student Encyclopedia 6 : H I.
.
London:
Britannica,
2010.
.
Turabian Style
Britannica Student Encyclopedia 6 : H I.
London:
Britannica,
2010.
.