Michael Bakunin, God and the State, pars 2.; Benjamin Tucker, State Socialism and Anarchism; Petrus Kropotkin, Anarchism: Its Philosophy and Ideal; Errico Malatesta, Towards Anarchism; Murray Bookchin, Anarchism: Past and Present, pars 4; An Introduction to Anarchism a Liz A. Highleyman.
theanarchistlibrary.org
"In a society developed on these lines, the voluntary associations which already now begin to cover all the fields of human activity would take a still greater extension so as to substitute themselves for the state in all its functions." Petrus Kropotkin, "Anarchism" in Encyclopaedia Britannica.
Anglice: "That is why Anarchy, when it works to destroy authority in all its aspects, when it demands the abrogation of laws and the abolition of the mechanism that serves to impose them, when it refuses all hierarchical organization and preaches free agreement—at the same time strives to maintain and enlarge the precious kernel of social customs without which no human or animal society can exist." Petrus Kropotkin. Anarchism: Its Philosophy and Ideal.
"Anarchists are opposed to irrational (e.g., illegitimate) authority, in other words, hierarchy—hierarchy being the institutionalisation of authority within a society." "B.1 Why are anarchists against authority and hierarchy?" in An Anarchist FAQ.