Genetive-Noun when the genitive case is used; Noun-Genitive when the coustruct state or the preposition ze is used.
the genitive forms of pronouns and nouns belong to the first declension precede the noun they modify, other genitive forms follow the noun they modify.
Noun-Genitive and Genitive-Noun are acceptable in the written form:
des mannes buuch = the man's book s'buuch des mannes = the man's book