Gaya APA
Helvig,Magne, ., Johannessen,Viggo, . (1965).
Norway :Land-Land-People-Industries A Brief Geography .
{s.n}:
Johan Grundt Tanum Forlag.
Gaya MLA
Helvig,Magne, ., Johannessen,Viggo, .
"Norway :Land-Land-People-Industries A Brief Geography".
{s.n}:
Johan Grundt Tanum Forlag,
1965.
Text.