Cita APA (7th ed.)

Boothroyd Jennifer. First Step Non Fiction What is A Gas. Lerner.

Cita Chicago (17th ed.)

Boothroyd Jennifer. First Step Non Fiction What Is A Gas. 2007 2007: Lerner.

Cita MLA (9th ed.)

Boothroyd Jennifer. First Step Non Fiction What Is A Gas. Lerner.