APA

Halling R. E., .Studies on Marasmiellus (<Tricholomataceae>) in the United States, I.A new species and a new combination. : .

Chicago

Halling Roy E, .Studies on Marasmiellus (<Tricholomataceae>) in the United States, I.A new species and a new combination. : .

Harvard

Halling R. E., .Studies on Marasmiellus (<Tricholomataceae>) in the United States, I.A new species and a new combination. : .

MLA

Halling Roy E, .: . .