APA Style
National Geographic Kids (Desember 2018) : Anjing Laut Harpa. ().
Jakarta:
Penerbitan Sarana Bobo.
Chicago Style
National Geographic Kids (Desember 2018) : Anjing Laut Harpa.
.
Jakarta:
Penerbitan Sarana Bobo,
.
Periodical Issues.
MLA Style
National Geographic Kids (Desember 2018) : Anjing Laut Harpa.
.
Jakarta:
Penerbitan Sarana Bobo,
.
Periodical Issues.
Turabian Style
National Geographic Kids (Desember 2018) : Anjing Laut Harpa.
Jakarta:
Penerbitan Sarana Bobo,
.
Periodical Issues.